Backrest structure

ABSTRACT

A backrest structure including a pad and a back clip, the back clip has a connecting part and a fixing portion to be held on a lazy back of a chair, when the pad is placed on the chair, the fixing portion can be inserted in a seam of the chair or can be clung on the upper area of the rear side of the chair lazy back, so that an effect of having the pad fixed on the chair can be attained; moreover, the relative position of the pad to the back clip can be adjusted; the pad is provided therein with a heat emitting element, a heat sinking element or an air bag, in order to adjust the temperature of the pad or the thickness of the pad for supporting a user, so that the pad can have multiple functions.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a backrest structure for a chair, and especially to a backrest structure of which a pad is adjustable of its position in relation to the chair.

2. Description of the Prior Art

Following improvement of life quality, modern people think more and more highly of the details concerning their lives. For instance, when one seats on a chair, particularly on a sofa, normally he may have the chair provided with a pad for getting more comfortable feeling of seating; the pad can afford leaning of the waist of a user thereon and make him feel better in seating.

Although the above pad can help a user to get more comfortable feeling of seating, in using the pad, quite many problems are to be solved. For example, the pad can only be placed randomly on a seating cushion, but is unable to have its height adjusted according to requirement of the user; every user has his own size of body concerning height, stoutness etc., and his own customary declination angle or orientation in seating; in view of these, a pad with a fixed volume and being placed on the chair randomly is unable to be satisfied by different people in their requirement in seating.

Moreover, the conventional pad does not have a function of temperature adjusting, if it had, a user could have his bones and muscles of his back's discomfort alleviated with hot compress, so that the pad can have multiple functions; therefore, as to a pad manufacturer, it is an object for him to go for nonstop hard working to manufacture a kind of pad for a chair that can get rid of the defects of having unchanged volume, disability to adjust position in pursuance of actual requirement and disability of hot compress.

In view of the above defects, the inventor of the present invention provides a backrest structure based on his professional experience of years in studying and experiments in the related fields; a pad of the backrest structure not only can have its volume and position adjusted, but also has a function of hot compress, so that one seats on a chair and leaning on the pd can have more comfortable feeling of seating.

SUMMARY OF THE INVENTION

The object of the present invention is to provide a backrest structure that not only can make its position fixed but adjustable on a chair, but also can make the thickness of its pad for supporting adjustable, and can have a function of hot compress, so that it can get an object of having multiple functions.

In order to achieve the above stated object, the backrest structure of the present invention is provided on the back of a pad of it with a back clip which has a connecting part movably connected on this back of the pad, and with a fixing portion able to be held on the lazy back of a chair, wherein:

The pad includes an outer envelopment contained therein with inner lining material, the outer envelopment is provided on its upper side with a receiving opening which can allow insertion of the back clip in a closely fitting mode.

The connecting part of the back clip is received in the receiving opening, and is movably provided in the receiving opening, in order that the back clip can have the position of it relatively to that of the pad adjusted by means of the connecting part.

In practicing, the appearance of the connecting part can be generally a planar board, the connecting part is provided with a first connecting unit, and in the receiving opening, a second connecting unit is movably connected with the first connecting unit, the second connecting unit includes a pair of zippers, while the first connecting unit includes a pair of engaging members for the zippers; the connecting part can be displaced relatively to the receiving opening by using the engaging members to pull to open or to close the zippers; further by virtue that the connecting part is inserted into the receiving opening in a closely fitting mode, after the connecting part is received in the receiving opening to movably connect therewith, a positioning function to prevent sliding by friction can be obtained.

The fixing portion of the back clip is generally planar, in order when in practicing, the fixing portion can be conveniently inserted in a seam of a seat portion of the chair; and more, when in practicing, the connecting part and the fixing portion can be provided between them with an elastic element, so that an elastic tight clamping force can be provided between them.

When the pad is placed on a chair such as a sofa, the fixing portion can be inserted in a seam of a chair to render the lazy back of the chair to be clamped between the connecting part and the fixing portion by the elastic clamping force, so that an effect of having the pad fixed on the chair can be attained; moreover, when the pad is placed on a chair such as an office chair, the two sides of the back clip are stretched away to have the fixing portion clung on the upper area of the rear side of the chair lazy back by the clamping force stated above, and to have the connecting part clung together with the pad on the front side of the chair lazy back, thereby the pad is fixed on the upper area of the chair lazy back, and by using the above mentioned connecting part to adjust the relative position of the pad to the back clip, an object that the pad is held and is adjustable on the chair can be obtained.

Additionally, in order to increase the practicality of use of the pad of the present invention, the pad is endued with a function of hot compress; in practicing, the pad can be provided between the above mentioned outer envelopment and inner lining material with a heat emitting element, and the outer envelopment is provided on one of its lateral sides with a control unit which can be connected with an electric power source to supply electricity for the heat emitting element and can control heating temperature of the heat emitting element to make the pad get the function of hot compress.

And more, in practicing, the pad can be provided between the outer envelopment and inner lining material with an air bag, an aeration unit and a control module, wherein the control module can be connected with an electric power source to provide electric power for the aeration unit to aerate the air bag, and the control module can control operation of the aeration unit to aerate the air bag to inflate the pad to a thickness most suitable for seating and for supporting the waist of a user.

And moreover, in practicing, the pad can be provided therein with a heat sinking element, and can be provided on the outer surface of it with a control member; wherein the control member can be connected with an electric power source to provide electric power for the heat sinking element for operation, the control member controls the heat sinking element to render the latter to blow air for a user to increase comfort of the user, thereby the pad can get an object of having multiple functions.

As compared with the conventional technique, the backrest structure of the present invention can be conveniently fixed but adjustable on the chair, and can have a function of hot compress as well as adjusting the thickness of the pad for supporting; thereby the pad can get a feeling of comfort and being most suitable for seating, and can get an object of having multiple functions.

The present invention will be apparent in its technical measures after reading the detailed description of the preferred embodiment thereof in reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing the appearance that the present invention is provided on a chair;

FIG. 2 is a partial anatomic perspective view of the present invention showing an elastic element is provided on a pad of the present invention;

FIG. 3 is an anatomic perspective view of the present invention showing a back clip is provided on the top of the pad;

FIG. 4 is a front view in part of the present invention showing a first and a second connecting unit including respectively a pair of zippers and a pair of engaging members;

FIG. 5 is a front view in part of the present invention showing operation of the first and second connecting units of FIG. 4;

FIG. 6 is a front view in part of the present invention showing a first and a second connecting unit, the latter is a plate having alternatively arranged concave hollows and convex peaks on its two lateral sides;

FIG. 7 is an anatomic perspective view of an adjusting unit of the present invention showing a first and a second connecting unit, both units have strip like embossments with a function of preventing sliding by friction;

FIG. 8 is a schematic side view of the present invention showing the pad is placed on an office chair with a fixing portion of the back clip inserted in a seam of a seat portion;

FIG. 9 is a schematic side view of the present invention showing the pad is placed on an office chair with the back clip being held by clamping on the top of a lazy back of the chair;

FIG. 10 is a schematic side view of the present invention showing a heat emitting element and a heating unit for heating the heat emitting element are provided in a space for receiving;

FIG. 11 is a schematic side view of the present invention showing an air bag and an air aeration unit are provided in the space for receiving;

FIG. 12 is a schematic side view of the present invention showing the air aeration unit is aerating the air bag;

FIG. 13 is an anatomic perspective view of the present invention showing allocation of a heat sinking element and a control member.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring firstly to FIGS. 1-3, the backrest structure of the present invention is provided on a pad 10 of it with a back clip 20 which has a connecting part 21 movably connecting the back of this pad 10, and with a fixing portion 22 able to be held on a lazy back of 101 of a chair 100, wherein:

The pad 10 includes an outer envelopment including two coating layers 12 contained therein with an inner lining material 11, the coating layers 12 are provided on its back with a receiving opening 13 which can allow insertion of the back clip 20 in a closely fitting mode.

The connecting part 21 of the back clip 20 is received in the receiving opening 13 by insertion, and is movably provided in the receiving opening 13, in order that the back clip 20 can have the position of it relatively to that of the pad adjusted by means of the connecting part 21.

In practicing, as shown in FIGS. 3 to 5, the appearance of the connecting part 21 can be generally a planar board, the connecting part is provided with a first connecting unit 211, and in the receiving opening 13, a second connecting unit 131 is movably connected with the first connecting unit 211, the second connecting unit 131 includes a pair of zippers, while the first connecting unit 211 includes a pair of engaging members for the zippers; the connecting part 21 can be displaced relatively to the receiving opening 13 by using the engaging members to pull to open or to close the zippers; further by virtue that the connecting part 21 is inserted into the receiving opening 13 in a closely fitting mode, after the connecting part 21 is received in the receiving opening 13 to movably connect therewith, a positioning function to prevent sliding by friction can be obtained.

As shown in FIG. 6, in practicing, the second connecting unit 131 can be a plate having alternatively arranged concave hollows and convex peaks on its two lateral sides, while the first connecting unit connecting unit 211 can include two steel balls each being abutted on a spring, the size of each steel ball makes it match with the size of and exactly receivable in any of the concave hollows of the second connecting unit 131, the connecting part 21 is movable in the receiving opening 13, and can be temporarily fixed by engaging after moving to get a function of positioning.

As shown in FIG. 7, in practicing, the first and the second connecting units 211, 131 can respectively be a member having thereon parallel transverse strip like embossments that can have a frictional function for preventing sliding, in order that when the connecting part 21 moves in the receiving opening 13, a fixing and holding effect can be obtained by the function of the transverse strip like embossments.

As shown in FIGS. 2 and 8, the back clip 20 has a generally planar fixing portion 22 in order that the latter is conveniently inserted into a seam 102 between the seat and the lazy back of the chair 100, and more, in practicing, the connecting part 21 and the fixing portion 22 can be provided therebetween with an elastic element 23 to give an elastic contracting or clamping force between them.

When the pad 10 is placed on the chair 100 such as a sofa, the fixing portion 22 of the connecting part 21 can be inserted into the seam 102 of the chair 100 to render the lazy back of the chair 100 to be clamped between the connecting part 21 and the fixing portion 22 by the elastic clamping force, so that a function of holding tight the pad 10 on the chair 100 can be obtained. As shown in FIG. 9, when in practicing, if the pad 10 is placed on the chair 100 such as an office chair, the two sides of the back clip 20 are stretched away to have the fixing portion 22 clung on the upper area of the rear side of the chair lazy back 101 by the clamping force stated above, and to have the connecting part 21 clung together with the pad 10 on the front side of the chair lazy back 101, thereby the pad 10 is fixed on the upper area of the chair lazy back 101, and by using the connecting part 21 to adjust the relative position of the pad 10 to the back clip 20, an object that the pad 10 is placed and is adjustable on the chair 100 can be obtained.

And as shown in FIG. 10, in order to increase the practicality of use of the pad 10, the pad 10 is endued with a function of hot compress; in practicing, the pad 10 can be provided between the above mentioned outer envelopment and inner lining material 11 with a heat emitting element 14, and the outer envelopment is provided on one of its lateral sides with a control unit 15 which can be connected with an electric power source to supply electricity for the heat emitting element 14 and can control heating temperature of the heat emitting element 14 to make the pad 10 get the function of hot compress.

And more, as shown in FIGS. 11 and 12, in practicing, the pad 10 can be provided between the coating layers 12 and the inner lining material with an air bag 16, an aeration unit 17 and a control module 18, wherein the control module 18 can be connected with an electric power source to provide electric power for the aeration unit 17 to aerate the air bag 16, and the control module 18 can control operation of the aeration unit 17 to aerate the air bag 16 to inflate the pad 10 to a thickness most suitable for seating and for supporting the waist of a user.

And moreover, as shown in FIG. 13, in practicing, the pad 10 can be provided therein with a heat sinking element 19 (in the drawing shown, the heat sinking element 19 includes two fans), and can be provided on the outer surface of it with a control member 191; wherein the control member 191 can be connected with an electric power source to provide electric power for the heat sinking element 19 for operation, the control member 191 controls the heat sinking element 19 to render the latter to blow air for a user to increase comfort of the user, thereby the pad can get an object of having multiple functions.

The names of the members and the drawings for the present invention are only for illustrating the technical content of the present invention, and not for giving any limitation to the scope of the present invention. It will be apparent to those skilled in this art that various modifications or changes without departing from the spirit of this invention shall also fall within the scope of the appended claims. 

1. A backrest structure comprising a pad and a back clip, said pad is provided thereon with a receiving opening, said back clip has a connecting part and a fixing portion to be held on a lazy back of a chair, said connecting part of said back clip is movably received in said receiving opening in order that said back clip is movable on a back of said back clip, wherein: said connecting part is received in said receiving opening by insertion and is provided with a first connecting unit, and in said receiving opening, a second connecting unit is movably connected with said first connecting unit, position of said back clip relatively to that of said pad is adapted to adjusting by moving of said first connecting unit relatively to said second connecting unit, and thereby allocation of said pad relatively to a chair is adjusted.
 2. The backrest structure as in claim 1, wherein: said connecting part and said fixing portion are provided between them with an elastic element, so that an elastic tight clamping and contracting force is provided between them.
 3. The backrest structure as in claim 1, wherein: said second connecting unit includes a pair of zippers, while said first connecting unit includes a pair of engaging members for said zippers.
 4. The backrest structure as in claim 1, wherein: said second connecting unit is a plate having alternatively arranged concave hollows and convex peaks on its two lateral sides, while said first connecting unit includes two steel balls each being abutted on a spring, size of each said steel ball makes it match with size of and exactly adapted for receiving in any of said concave hollows of said second connecting unit.
 5. The backrest structure as in claim 1, wherein: said first and said second connecting units each is a member having thereon parallel transverse strip like embossments having a frictional function for preventing sliding.
 6. The backrest structure as in claim 1, wherein: said pad is provided therein with a heat emitting element, and is provided on an outer surface of it with a control unit which is connected with an electric power source to supply electricity for said heat emitting element to control heating temperature of said heat emitting element to make said pad get a function of hot compress.
 7. The backrest structure as in claim 1, wherein: said pad is provided therein with an air bag and an aeration unit, and is provided on an outer surface of it with a control module, wherein said control module is connected with an electric power source to provide electric power for said aeration unit to aerate said air bag, and said control module controls operation of said aeration unit to aerate said air bag to inflate said pad to a thickness for supporting a waist of a user.
 8. The backrest structure as in claim 1, wherein: said pad is provided therein with a heat sinking element, and is provided on an outer surface of it with a control member; wherein said control member is connected with an electric power source to provide electric power for said heat sinking element for heating, said control member controls the heat sinking element to blow air for a user.
 9. A backrest structure comprising a pad and a back clip, said pad is provided therein with a heat emitting element, and is provided on an outer surface of it with a control unit which is connected with an electric power source to supply electricity for said heat emitting element for heating, and to control heating temperature of said heat emitting element to make said pad get a function of hot compress; said pad is provided thereon with a receiving opening, said back clip has a connecting part and a fixing portion to be held on a lazy back of a chair, wherein: said connecting part is received in said receiving opening by insertion and is provided with a first connecting unit, and in said receiving opening, a second connecting unit is movably connected with said first connecting unit, position of said back clip relatively to that of said pad is adapted to adjusting by moving of said first connecting unit relatively to said second connecting unit, and thereby allocation of said pad relatively to a chair is adjusted.
 10. The backrest structure as in claim 9, wherein: said connecting part and said fixing portion are provided between them with an elastic element, so that an elastic tight clamping and contracting force is provided between them.
 11. The backrest structure as in claim 9, wherein: said second connecting unit includes a pair of zippers, while said first connecting unit includes a pair of engaging members for said zippers.
 12. The backrest structure as in claim 9, wherein: said second connecting unit is a plate having alternatively arranged concave hollows and convex peaks on its two lateral sides, while said first connecting unit includes two steel balls each being abutted on a spring, size of each said steel ball makes it match with size of and exactly adapted for receiving in any of said concave hollows of said second connecting unit.
 13. The backrest structure as in claim 9, wherein: said first and the second connecting units each is a member having thereon parallel transverse strip like embossments having a frictional function for preventing sliding.
 14. The backrest structure as in claim 9, wherein: said pad is provided therein with an air bag and an aeration unit, and is provided on an outer surface of it with a control module, wherein said control module is connected with an electric power source to provide electric power for said aeration unit to aerate said air bag, and said control module controls operation of said aeration unit to aerate said air bag to inflate said pad to a thickness for supporting a waist of a user.
 15. The backrest structure as in claim 9, wherein: said pad is provided therein with a heat sinking element, and is provided on an outer surface of it with a control member; wherein said control member is connected with an electric power source to provide electric power for said heat sinking element for heating, said control member controls the heat sinking element to blow air for a user.
 16. A backrest structure comprising a pad and a back clip, said pad is provided therein with an air bag and an aeration unit, and is provided on an outer surface of it with a control module, wherein said control module is connected with an electric power source to provide electric power for said aeration unit to aerate said air bag, and said control module controls operation of said aeration unit to aerate said air bag to inflate said pad to a thickness for supporting a waist of a user; said pad is provided thereon with a receiving opening, said back clip has a connecting part and a fixing portion to be held on a lazy back of a chair, said connecting part of said back clip is movably received in said receiving opening in order that said back clip is movable on a back of said back clip, wherein: said connecting part is received in said receiving opening by insertion and is provided with a first connecting unit, and in said receiving opening, a second connecting unit is movably connected with said first connecting unit, position of said back clip relatively to that of said pad is adapted to adjusting by moving of said first connecting unit relatively to said second connecting unit, and thereby allocation of said pad relatively to a chair is adjusted.
 17. The backrest structure as in claim 16, wherein: said connecting part and said fixing portion are provided between them with an elastic element, so that an elastic tight clamping and contracting force is provided between them.
 18. The backrest structure as in claim 16, wherein: said second connecting unit includes a pair of zippers, while said first connecting unit includes a pair of engaging members for said zippers.
 19. The backrest structure as in claim 16, wherein: said second connecting unit is a plate having alternatively arranged concave hollows and convex peaks on its two lateral sides, while said first connecting unit connecting unit includes two steel balls each being abutted on a spring, size of each said steel ball makes it match with size of and exactly adapted for receiving in any of said concave hollows of said second connecting unit.
 20. The backrest structure as in claim 16, wherein: said first and the second connecting units each is a member having thereon parallel transverse strip like embossments having a frictional function for preventing sliding.
 21. The backrest structure as in claim 16, wherein: said pad is provided therein with a heat emitting element, and is provided on an outer surface of it with a control unit which is connected with an electric power source to supply electricity for said heat emitting element to control heating temperature of said heat emitting element to make said pad get a function of hot compress.
 22. The backrest structure as in claim 16, wherein: said pad is provided therein with a heat sinking element, and is provided on an outer surface of it with a control member; wherein said control member is connected with an electric power source to provide electric power for said heat sinking element for heating, said control member controls the heat sinking element to blow air for a user. 